GOST 8955-75
GOST 8955−75 Connecting parts from malleable cast iron with cylindrical thread for pipelines. Clutch straight long. Main dimensions (with Amendments No. 1, 2)
GOST 8955−75
Group B61
INTERSTATE STANDARD
CONNECTING PARTS FROM MALLEABLE CAST IRON WITH CYLINDRICAL THREAD FOR PIPELINES. CLUTCH STRAIGHT LONG
Basic dimensions
Ductile iron fittings with parallel thread for pipelines. Straight long sockets. Basic dimensions
ISS 23.040.60
Date of introduction 1977−01−01
The decision of the State standards Committee of the Council of Ministers of the USSR from
Limitation of actions taken by Protocol No. 2−92 of the Interstate Council for standardization, Metrology and certification (ICS 2−93)
REPLACE GOST 8955−59
EDITION (September, 2010) with Changes No. 1, 2 approved in September 1980 and March 1983 (IUS sizes 11−80, 7 to 83)
1a. Clutch should produce two versions:
1 — with right-hand thread;
2 — right-left-hand thread.
Standard is fully consistent with CT CMEA 3303−81.
(Added, Rev. N 2).
1. The principal dimensions of couplings shall be as specified in the drawing and in the table.
Drawing. The principal dimensions of couplings
Version 1
Version 2
Note. The drawing does not define the design of the clutch.
Dimensions in mm
Conditional pass |
Thread |
The number of edges | Weight without cover, kg, not more* | ||
| The variant according to GOST 8944−75 | |||||
| 1 |
2 | ||||
| 8 |
G |
27 | 2 | 0,034 | 0,036 |
| 10 |
G |
30 | 2 | 0,044 | 0,047 |
| 15 |
G |
36 | 2 | 0,074 | 0,079 |
| 20 |
G |
39 | 2 | 0,108 | 0,111 |
| 25 |
G 1 — | 45 | 4 | 0,173 | 0,173 |
| 32 |
G 1 |
50 | 4 | 0,245 | 0,245 |
| 40 |
G 1 |
55 | 4 | 0,342 | 0,296 |
| 50 |
G 2 — | 65 | 6 | 0,560 | To 0.506 |
| (65) |
G 2 |
74 | 6 | 0,780 | 0,703 |
| (80) |
G 3 — | 80 | 6 | 1,000 | 1,010 |
| (100) |
G 4 — B | 94 | 6 | 1,975 | 1,805 |
_______________
* For inquiries.
Notes:
1. Weight of galvanized fittings should not exceed the weight non more than 5%.
2. The coupling shown in the table in brackets is not recommended.
Examples of symbols
Straight long clutch performance 1 no coverage =40 mm:
Clutch long 1−40 GOST 8955−75
The same zinc-coating:
Coupling long-1-C-40 GOST 8955−75
(Changed edition, Rev. N 1, 2).
2. The constructive dimensions and technical requirements — GOST 8944−75.
The electronic text of the document
prepared by JSC «Code» and checked by:
the official publication of the
Pipes of metal and connecting
parts to them. Part 4. Pipe black
metals and alloys cast and connective
parts to them. The basic dimensions. Methods
technological tests of tubes:
SB. Standards. — M.: STANDARTINFORM, 2010
